Improvement in boiler fire extinguishers



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I l l l l THOMAS R..S|NCLA|RE. i Improvement in` B oler Eire" Excilngu'ishers.A

` l Pfn'ieds'ep.19,1871( PATENT truce.

- THOMAS RSINOLATR, OFNFJW YORK, N. Y.

IMPROVEMENT IN BOlLE-R FIRVE EXTINGUISHERS.

' Specification forming part of LettersPatent No. 119,190, dated September 19, 1871.

j To all whom it may concern:

description lof the same, reference being had to the accompanying drawing making a part of this specification, in which- Figure l is a longitudinal vertical section through the case, boiler, and furnace. Fig. 2 is a horizontal section through the boiler above the horizontal pipes; and Fig. 3 is a transverse vertical section through the case, boiler, and furnace.

This invention relates to a means for enabling a boiler to put out its own flres when steam is raised in it uto a point beyond the permitted limit, by means of a system of pipes connecting the boiler-and furnace, and provided with a safety water-valve, which, when the pressure is sufficient to raise its weight, rises, thus allowing water to be forced from `the boiler to the furnace.

Referring to the drawing, a is a pipe, placed within a boiler, A, the lower end of said pipe being perforated, so as to admit water andvexclude dirt .or particles that might obstruct the proper working of the valve, and extending to a point that shall always be below the level of water in lthe boiler. The pipe c leads in any convenient direction through the boiler, and passes into a case, B, that, in this instance, is represented as attached to the top of the boiler, but may, for that matter, as well or better be situated at some point above or away from the boiler, where it is accessible Vand generally visible. That part of the pipe a that is within the case B is provided with a safety water-valve, of which b is the stem, c the lever, and d the weight. The

lever c is provided with a sufficient number of eyes, c', to receive the bolt of the lock, which connes .the `.weight d at any particular point. In adjusting the said weight d, due allowance should be made for the height of the safety water-valve from the level of water in the boiler. A second pipe, f, of say equal capacity with a, connects brauch pipes n and p with the said pipe out extinguishing thc iire.

a, the branch n extending through the case and running to some point where water may conveniently be discharged from its end, and the branch p extending into the boiler, wherein it communicates at its lower end with a cross-pipe, g, from which two pipes, 7L, more or less, extend along the boiler, from each of which pipes L tubes fi, three, more or less, in number, extend downward, opening directly into the furnace C. The pipe f and branch p should each be of at least equal capacity with the cross-pipe g, and the cross-pipe g should be of at least the capacity of Aall the pipes IL, and each of these latter should be of at least equal capacity to all its branches c'. The case B is provided with a door, B', having a window in it. This door is furnished with a lock, the key of which should be in the hands of the captain of the vessel, owner of the factory, or other proper' person, never in the hands of the engineer. As regards the key of the weight ol, that should be in the hands of the boiler inspector. The branches n and lo of the pipe j' are furnished with cocks Z and lo, one at each side of the connecting-pipe f. After an inspection of the boiler by the proper oficer, the weight ol should be set at the point of maximum pressure and locked there. On the inside ofthe Window of the door B the inspector may paste a certificate showing the number of pounds pressure allowed by him on the day of inspection. The cock 7c should be opened and the cock Z closed. Then the door B must be also locked. Whenever the pressure in the boiler is allowed to exceed the amount for which the weight d is set, the safety water-valve in the pipe a will rise Aand water will flow through the` pipes a f 1o g h i into the furnace and extinguisli" the iire. The knowledge by the engineer that this is sure to take place in the event of the pressure exceeding the prescribed limit will make him careful to keep the pressure within due bounds. If the cock k be closed and the cock l be opened, the water, when the safety water-valve is raised, will flow through the branch u of the pipe f, and, by the issue of water therefrom, information will be conveyed of the proper working of the valve with- This trial should be made at stated intervals by the person in charge of the key of the case B, and a record kept of such trial.

This apparatus, it will be seen, renders it iinpossible for the engineer to prevent the extinguishinent of the re whenever the pressure is excessive. The branch pipe p need not, in all cases, pass through the boiler, but may be carried outside the same to the nre-front or other convenient point, and the Water injected from thence into the fire.

Having thus described my invention, What I claim as new, and desire to secure by Letters Patent, is-

The apparatus, arranged substantially as herein described, whereby' steam in a boiler causes Water to ilow fron] the boiler to the furnace Whenever the pressure in the boiler is sufficient to raise the safety Water-valve that regulates such ow. v

Witnesses: THOS. R. SINGLAIRE.

THos. D. D. OURAND,

CHAs. A. PETTIT. (72.) 

